Few vintage Rolex dials stop you in your tracks quite like a grey sigma. This ref. 1601, produced circa 1973, is one of those watches.
The dial is the story here. A deep, sunburst grey that shifts with the light — darker in the shade, almost slate-blue under direct sun. Set into it are solid white gold applied baton markers, denoted by the sigma (σ) symbols at the base of the dial that give this configuration its collector name. The white gold catches light differently than the steel alternatives of the same era: sharper, colder, more deliberate. It elevates an already beautiful dial into something genuinely special.
The lume plots have developed exactly the kind of warm, honeyed patina that fifty years of honest ageing produces. Unrestored, untouched, entirely original. Each plot sits proud of the dial surface, slightly domed, the colour varying subtly from marker to marker in the way that only time can create — not a refinisher’s brush.
The 36mm Oyster case is in great condition. The fluted white gold bezel remains crisp, its milling sharp and well-defined. Above the dial sits the original plexiglass crystal — slightly domed, with that characteristic warmth that sapphire never quite replicates. The cyclops magnifier at 3 o’clock is clear and well-bonded.
On the wrist, the watch is paired with a “Mexican” Jubilee bracelet — the collector term for the hollow, folded five-link bracelets produced during this period. It’s in excellent shape for its age: good length remaining, functioning clasp, and the kind of patina on the centre links that matches the watch perfectly.
Inside runs the Rolex calibre 1570, the automatic movement that powered the Datejust through much of the 1960s and 70s, and earned its reputation the hard way.
This is the kind of watch we built Lorièn Watches around. Based in Amsterdam, we source timepieces like this one specifically because they tell a complete story — original, unrestored, and honest about their age. A grey sigma 1601 in this condition doesn’t come through our doors often, and when it does, it doesn’t stay long.
